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<div class="title">TextRankExtractor.hpp</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#ifndef CPPJIEBA_TEXTRANK_EXTRACTOR_H</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#define CPPJIEBA_TEXTRANK_EXTRACTOR_H</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;</div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;cmath&gt;</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &quot;Jieba.hpp&quot;</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &quot;glog/logging.h&quot;</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacecppjieba.html">cppjieba</a> {</div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="keyword">using namespace </span><a class="code" href="namespacestd.html">std</a>;</div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div><div class="line"><a name="l00011"></a><span class="lineno"><a class="line" href="classcppjieba_1_1TextRankExtractor.html">   11</a></span>&#160;<span class="keyword">class </span><a class="code" href="classcppjieba_1_1TextRankExtractor.html">TextRankExtractor</a> {</div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">   13</a></span>&#160;  <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">_Word</a> {</div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;    <span class="keywordtype">string</span> word;</div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;    vector&lt;size_t&gt; offsets;</div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;    <span class="keywordtype">double</span> weight;</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;  }    <a class="code" href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">Word</a>; <span class="comment">// struct Word</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;  <span class="keyword">typedef</span> std::map&lt;string, Word&gt; WordMap;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;  <span class="keyword">class </span>WordGraph {</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;   <span class="keyword">private</span>:</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    <span class="keyword">typedef</span> <span class="keywordtype">double</span> Score;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;    <span class="keyword">typedef</span> <span class="keywordtype">string</span> Node;</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    <span class="keyword">typedef</span> std::set&lt;Node&gt; NodeSet;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    <span class="keyword">typedef</span> std::map&lt;Node, double&gt; Edges;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="keyword">typedef</span> std::map&lt;Node, Edges&gt; Graph;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    <span class="comment">//typedef std::unordered_map&lt;Node,double&gt; Edges;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    <span class="comment">//typedef std::unordered_map&lt;Node,Edges&gt; Graph;</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    <span class="keywordtype">double</span> d;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    Graph graph;</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    NodeSet nodeSet;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;   <span class="keyword">public</span>:</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    WordGraph(): d(0.85) {};</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    WordGraph(<span class="keywordtype">double</span> in_d): d(in_d) {};</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <span class="keywordtype">void</span> addEdge(Node start, Node end, <span class="keywordtype">double</span> weight) {</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;      Edges temp;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;      Edges::iterator gotEdges;</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;      nodeSet.insert(start);</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;      nodeSet.insert(end);</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;      graph[start][end] += weight;</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;      graph[end][start] += weight;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    }</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keywordtype">void</span> rank(WordMap &amp;ws, <span class="keywordtype">size_t</span> rankTime = 10) {</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;      WordMap outSum;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;      Score wsdef, min_rank, max_rank;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;      <span class="keywordflow">if</span>( graph.size() == 0)</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        <span class="keywordflow">return</span>;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;      wsdef = 1.0 / graph.size();</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;      <span class="keywordflow">for</span>(Graph::iterator edges = graph.begin(); edges != graph.end(); ++edges) {</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;        <span class="comment">// edges-&gt;first start节点；edge-&gt;first end节点；edge-&gt;second 权重</span></div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        ws[edges-&gt;first].word = edges-&gt;first;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        ws[edges-&gt;first].weight = wsdef;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        outSum[edges-&gt;first].weight = 0;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="keywordflow">for</span>(Edges::iterator edge = edges-&gt;second.begin(); edge != edges-&gt;second.end(); ++edge) {</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;          outSum[edges-&gt;first].weight += edge-&gt;second;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        }</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;      }</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;      <span class="comment">//sort(nodeSet.begin(),nodeSet.end()); 是否需要排序?</span></div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;      <span class="keywordflow">for</span>( <span class="keywordtype">size_t</span> i = 0; i &lt; rankTime; i++ ) {</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        <span class="keywordflow">for</span>(NodeSet::iterator node = nodeSet.begin(); node != nodeSet.end(); node++ ) {</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;          <span class="keywordtype">double</span> s = 0;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;          <span class="keywordflow">for</span>( Edges::iterator edge = graph[*node].begin(); edge != graph[*node].end(); edge++ )</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;            <span class="comment">// edge-&gt;first end节点；edge-&gt;second 权重</span></div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;            s += edge-&gt;second / outSum[edge-&gt;first].weight * ws[edge-&gt;first].weight;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;          ws[*node].weight = (1 - d) + d * s;</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        }</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;      }</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;      min_rank = max_rank = ws.begin()-&gt;second.weight;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;      <span class="keywordflow">for</span>(WordMap::iterator i = ws.begin(); i != ws.end(); i ++) {</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        <span class="keywordflow">if</span>( i-&gt;second.weight &lt; min_rank ) {</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;          min_rank = i-&gt;second.weight;</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;        }</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keywordflow">if</span>( i-&gt;second.weight &gt; max_rank ) {</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;          max_rank = i-&gt;second.weight;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        }</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;      }</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;      <span class="keywordflow">for</span>(WordMap::iterator i = ws.begin(); i != ws.end(); i ++) {</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        ws[i-&gt;first].weight = (i-&gt;second.weight - min_rank / 10.0) / (max_rank - min_rank / 10.0);</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;      }</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    }</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;  };</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;  <a class="code" href="classcppjieba_1_1TextRankExtractor.html">TextRankExtractor</a>(<span class="keyword">const</span> <span class="keywordtype">string</span>&amp; dictPath,</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;                    <span class="keyword">const</span> <span class="keywordtype">string</span>&amp; hmmFilePath,</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;                    <span class="keyword">const</span> <span class="keywordtype">string</span>&amp; stopWordPath,</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;                    <span class="keyword">const</span> <span class="keywordtype">string</span>&amp; userDict = <span class="stringliteral">&quot;&quot;</span>)</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    : segment_(dictPath, hmmFilePath, userDict) {</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    LoadStopWordDict(stopWordPath);</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  }</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;  <a class="code" href="classcppjieba_1_1TextRankExtractor.html">TextRankExtractor</a>(<span class="keyword">const</span> <a class="code" href="classcppjieba_1_1DictTrie.html">DictTrie</a>* dictTrie,</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;                    <span class="keyword">const</span> <a class="code" href="structcppjieba_1_1HMMModel.html">HMMModel</a>* model,</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;                    <span class="keyword">const</span> <span class="keywordtype">string</span>&amp; stopWordPath)</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    : segment_(dictTrie, model) {</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    LoadStopWordDict(stopWordPath);</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;  }</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;  <a class="code" href="classcppjieba_1_1TextRankExtractor.html">TextRankExtractor</a>(<span class="keyword">const</span> <a class="code" href="classcppjieba_1_1Jieba.html">Jieba</a>&amp; jieba, <span class="keyword">const</span> <span class="keywordtype">string</span>&amp; stopWordPath) : segment_(jieba.GetDictTrie(), jieba.GetHMMModel()) {</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    LoadStopWordDict(stopWordPath);</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;  }</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  ~<a class="code" href="classcppjieba_1_1TextRankExtractor.html">TextRankExtractor</a>() {</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;  }</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;  <span class="keywordtype">void</span> Extract(<span class="keyword">const</span> <span class="keywordtype">string</span>&amp; sentence, vector&lt;string&gt;&amp; keywords, <span class="keywordtype">size_t</span> topN)<span class="keyword"> const </span>{</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    vector&lt;Word&gt; topWords;</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    Extract(sentence, topWords, topN);</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; topWords.size(); i++) {</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;      keywords.push_back(topWords[i].word);</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    }</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;  }</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;  <span class="keywordtype">void</span> Extract(<span class="keyword">const</span> <span class="keywordtype">string</span>&amp; sentence, vector&lt;pair&lt;string, double&gt; &gt;&amp; keywords, <span class="keywordtype">size_t</span> topN)<span class="keyword"> const </span>{</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    vector&lt;Word&gt; topWords;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    Extract(sentence, topWords, topN);</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; topWords.size(); i++) {</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;      keywords.push_back(pair&lt;string, double&gt;(topWords[i].word, topWords[i].weight));</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    }</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;  }</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;  <span class="keywordtype">void</span> Extract(<span class="keyword">const</span> <span class="keywordtype">string</span>&amp; sentence, vector&lt;Word&gt;&amp; keywords, <span class="keywordtype">size_t</span> topN, <span class="keywordtype">size_t</span> span = 5, <span class="keywordtype">size_t</span> rankTime = 10)<span class="keyword"> const </span>{</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    vector&lt;string&gt; words;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    segment_.Cut(sentence, words);</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    TextRankExtractor::WordGraph graph;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    WordMap wordmap;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    <span class="keywordtype">size_t</span> offset = 0;</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i = 0; i &lt; words.size(); i++) {</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;      <span class="keywordtype">size_t</span> t = offset;</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;      offset += words[i].size();</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;      <span class="keywordflow">if</span> (IsSingleWord(words[i]) || stopWords_.find(words[i]) != stopWords_.end()) {</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;      }</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;      <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> j = i + 1, skip = 0; j &lt; i + span + skip &amp;&amp; j &lt; words.size(); j++) {</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        <span class="keywordflow">if</span> (IsSingleWord(words[j]) || stopWords_.find(words[j]) != stopWords_.end()) {</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;          skip++;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;          <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;        }</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        graph.addEdge(words[i], words[j], 1);</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;      }</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;      wordmap[words[i]].offsets.push_back(t);</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    }</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    <span class="keywordflow">if</span> (offset != sentence.size()) {</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;      VLOG(2) &lt;&lt; <span class="stringliteral">&quot;words illegal&quot;</span>;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;      <span class="keywordflow">return</span>;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    }</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    graph.rank(wordmap, rankTime);</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    keywords.clear();</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    keywords.reserve(wordmap.size());</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    <span class="keywordflow">for</span> (WordMap::iterator itr = wordmap.begin(); itr != wordmap.end(); ++itr) {</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;      keywords.push_back(itr-&gt;second);</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    }</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    topN = min(topN, keywords.size());</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    partial_sort(keywords.begin(), keywords.begin() + topN, keywords.end(), Compare);</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    keywords.resize(topN);</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;  }</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;  <span class="keywordtype">void</span> LoadStopWordDict(<span class="keyword">const</span> <span class="keywordtype">string</span>&amp; filePath) {</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    ifstream ifs(filePath.c_str());</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    CHECK(ifs.is_open()) &lt;&lt; <span class="stringliteral">&quot;open &quot;</span> &lt;&lt; filePath &lt;&lt; <span class="stringliteral">&quot; failed&quot;</span>;</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    <span class="keywordtype">string</span> line ;</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="keywordflow">while</span> (getline(ifs, line)) {</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;      stopWords_.insert(line);</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;    }</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;    assert(stopWords_.size());</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;  }</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;  <span class="keyword">static</span> <span class="keywordtype">bool</span> Compare(<span class="keyword">const</span> <a class="code" href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">Word</a> &amp;x, <span class="keyword">const</span> <a class="code" href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">Word</a> &amp;y) {</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    <span class="keywordflow">return</span> x.weight &gt; y.weight;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;  }</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;  <a class="code" href="classcppjieba_1_1MixSegment.html">MixSegment</a> segment_;</div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;  unordered_set&lt;string&gt; stopWords_;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;}; <span class="comment">// class TextRankExtractor</span></div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;<span class="keyword">inline</span> ostream&amp; operator &lt;&lt; (ostream&amp; os, <span class="keyword">const</span> <a class="code" href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">TextRankExtractor::Word</a>&amp; word) {</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;  <span class="keywordflow">return</span> os &lt;&lt; <span class="stringliteral">&quot;{\&quot;word\&quot;: \&quot;&quot;</span> &lt;&lt; word.word &lt;&lt; <span class="stringliteral">&quot;\&quot;, \&quot;offset\&quot;: &quot;</span> &lt;&lt; word.offsets &lt;&lt; <span class="stringliteral">&quot;, \&quot;weight\&quot;: &quot;</span> &lt;&lt; word.weight &lt;&lt; <span class="stringliteral">&quot;}&quot;</span>;</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;}</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;} <span class="comment">// namespace cppjieba</span></div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;</div><div class="ttc" id="structcppjieba_1_1HMMModel_html"><div class="ttname"><a href="structcppjieba_1_1HMMModel.html">cppjieba::HMMModel</a></div><div class="ttdef"><b>Definition:</b> HMMModel.hpp:13</div></div>
<div class="ttc" id="namespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdef"><b>Definition:</b> StdExtension.hpp:18</div></div>
<div class="ttc" id="namespacecppjieba_html"><div class="ttname"><a href="namespacecppjieba.html">cppjieba</a></div><div class="ttdef"><b>Definition:</b> DictTrie.hpp:18</div></div>
<div class="ttc" id="structcppjieba_1_1TextRankExtractor_1_1__Word_html"><div class="ttname"><a href="structcppjieba_1_1TextRankExtractor_1_1__Word.html">cppjieba::TextRankExtractor::_Word</a></div><div class="ttdef"><b>Definition:</b> TextRankExtractor.hpp:13</div></div>
<div class="ttc" id="classcppjieba_1_1Jieba_html"><div class="ttname"><a href="classcppjieba_1_1Jieba.html">cppjieba::Jieba</a></div><div class="ttdef"><b>Definition:</b> Jieba.hpp:9</div></div>
<div class="ttc" id="classcppjieba_1_1TextRankExtractor_html"><div class="ttname"><a href="classcppjieba_1_1TextRankExtractor.html">cppjieba::TextRankExtractor</a></div><div class="ttdef"><b>Definition:</b> TextRankExtractor.hpp:11</div></div>
<div class="ttc" id="classcppjieba_1_1DictTrie_html"><div class="ttname"><a href="classcppjieba_1_1DictTrie.html">cppjieba::DictTrie</a></div><div class="ttdef"><b>Definition:</b> DictTrie.hpp:27</div></div>
<div class="ttc" id="classcppjieba_1_1MixSegment_html"><div class="ttname"><a href="classcppjieba_1_1MixSegment.html">cppjieba::MixSegment</a></div><div class="ttdef"><b>Definition:</b> MixSegment.hpp:11</div></div>
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